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Remove one unnecessary call for sign_holder_commitment_and_htlcs #2579

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Merged
merged 1 commit into from
Sep 15, 2023
Merged

Remove one unnecessary call for sign_holder_commitment_and_htlcs #2579

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7 changes: 5 additions & 2 deletions lightning/src/chain/channelmonitor.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -3491,7 +3491,9 @@ impl<Signer: WriteableEcdsaChannelSigner> ChannelMonitorImpl<Signer> {
let commitment_package = PackageTemplate::build_package(self.funding_info.0.txid.clone(), self.funding_info.0.index as u32, PackageSolvingData::HolderFundingOutput(funding_outp), self.best_block.height(), self.best_block.height());
claimable_outpoints.push(commitment_package);
self.pending_monitor_events.push(MonitorEvent::CommitmentTxConfirmed(self.funding_info.0));
let commitment_tx = self.onchain_tx_handler.get_fully_signed_holder_tx(&self.funding_redeemscript);
// Although we aren't signing the transaction directly here, the transaction will be signed
// in the claim that is queued to OnchainTxHandler. We set holder_tx_signed here to reject
// new channel updates.
self.holder_tx_signed = true;
// We can't broadcast our HTLC transactions while the commitment transaction is
// unconfirmed. We'll delay doing so until we detect the confirmed commitment in
Expand All @@ -3501,7 +3503,8 @@ impl<Signer: WriteableEcdsaChannelSigner> ChannelMonitorImpl<Signer> {
// assuming it gets confirmed in the next block. Sadly, we have code which considers
// "not yet confirmed" things as discardable, so we cannot do that here.
let (mut new_outpoints, _) = self.get_broadcasted_holder_claims(&self.current_holder_commitment_tx, self.best_block.height());
let new_outputs = self.get_broadcasted_holder_watch_outputs(&self.current_holder_commitment_tx, &commitment_tx);
let unsigned_commitment_tx = self.onchain_tx_handler.get_unsigned_holder_commitment_tx();
let new_outputs = self.get_broadcasted_holder_watch_outputs(&self.current_holder_commitment_tx, &unsigned_commitment_tx);
if !new_outputs.is_empty() {
watch_outputs.push((self.current_holder_commitment_tx.txid.clone(), new_outputs));
}
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4 changes: 4 additions & 0 deletions lightning/src/chain/onchaintx.rs
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Expand Up @@ -1123,6 +1123,10 @@ impl<ChannelSigner: WriteableEcdsaChannelSigner> OnchainTxHandler<ChannelSigner>
ret
}

pub(crate) fn get_unsigned_holder_commitment_tx(&self) -> Transaction {
self.holder_commitment.trust().built_transaction().transaction.clone()
}

//TODO: getting lastest holder transactions should be infallible and result in us "force-closing the channel", but we may
// have empty holder commitment transaction if a ChannelMonitor is asked to force-close just after OutboundV1Channel::get_funding_created,
// before providing a initial commitment transaction. For outbound channel, init ChannelMonitor at Channel::funding_signed, there is nothing
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